Being underweight can lead to various consequences including nutritional deficiencies and decreased immune function. Individuals may experience fatigue, osteoporosis, and increased vulnerability to infections. Additionally, being underweight can impact reproductive health and hinder proper growth in children and adolescents. Psychological issues, such as anxiety about food and body image problems, may also arise. It’s crucial for underweight individuals to consult a healthcare professional to address underlying causes and create a safe plan for achieving a healthier weight.